Manufacture of brick



- sla -from 200 to ATING 0R PLASTIC.

Patented July 19, 1932 UNITED STATES GEORGE WITH, 01 NEW YORK, N. Y., ASSIGNOR OF ONE-HALF TO RICHARD '1. HABTE,

OF NEW YORK, N. Y.

MANUFACTURE OF BRICK No Drawing.

This invention relates to a process of and materials for the manufacture of brick without the necessity of burning in a kiln, as is necessary with clay products of such character.

A further object is to provide a mixture of materials and process by means of which brick, may be produced in a variety of shapes which are impractical in clay products on account of cracking, chipping, warping and shrinking during the burning process.

Another object of this invention is to produce a brick, made of a blast furnace slag so as to retain the characteristic of lightness accompanied, however, by strength superior to that of the burned clay brick.

In carrying out my process, I use a mixture composed of granulated Whig, hydraulic cement pulverlze calcium chloride lead Borate and i ents the following proportmnsz-rnulated blast fu par s y weig 1T aplg'fi cementhfrom 50 to 100 parts 6y weig u verlzed calcium chloride-fro? 3 to 8 parts 5 weight lead 5ora@- from to 6 parts by Zveight, om 5 to 10 parts by weight, t mixed in dry state and sufiicient water added to form a moistened mass, and pressed into brick tile and the like. After the brick are pressed, they will be placed in a curing tunnel or chamber and treated under steam and moisture at a temperature not less than 75 C. and not over 100 0., for a period of six hours.

As to the pigments employed, I do not limit myself to the particular pigments, since almost any insoluble mineral pigments can be use Having thus described my invention, it is obvious that immaterial modifications may be made in the same without departing from the spirit of the invention, hence, I do not wish to be understood as limiting myself to the exact steps or proportions above set forth.

What claim as new and desire to secure by Letters Patent is 1. A blast furnace slag brick consisting of granulated blast furnace slag, cement, calcium chloride lead borate and a pigment.

2. A blast furnace slag brick consisting of Application filed November 22, 1929. Serial 1T0. 409,192.

signed my name.

GEORGE WITTY. 

